My guess – and it’s only a guess – is that the quality of some of the parts in this design and the design itself are struggling to cope. So it seems like I need to download their special driver to be able to run higher bitrates properly through USB? WITH APTX: The Airpulse A300Pro features a QCC3031 chipset from Qualcomm, incorporating Bluetooth V5. British audio engineering has been lauded the world over and in the Airpulse bookshelf series, reference sound quality is delivered with aplomb.

A perfect example for me was when my daughter came home from school one afternoon raving about a piece of music she'd found on Spotify.

The classy, smooth and detailed character of the ribbon tweeter also helps, although its narrow vertical dispersion is noticeable. Using the same XMOS core as its older siblings, this unassumingly basic cabinet delivers outstanding performance beyond expectations.

The perfect combination of Hi-Res digital audio processing technology and an aesthetic of understated elegance creates a High-Fidelity audio system with intoxicating sound quality and visual appeal. I was impressed with the sound quality, not really a ‘High-End HiFi’ sound but much, much better than one would expect from Bluetooth speakers.

Secondly, the magnetic field through which voice coil moves is rarely linear at its extremities, so the arrangement has a degree of in-built nonlinearity. The A300 organ-pipe resonance is a potentially audible one, however, because its peak is only around 5dB below the fundamental port output. The thin aluminium ribbon diaphragm has high sensitivity, superb transient response, extended frequency range and well-defined resolution. That way the capacitors and other components that have limited lifespan will not be used when you do not use the speakers !